MESON Chess Problem Database
Problem Display
PID: 186805 (8/3Np3/4p1K1/1P1kB2Q/1bp3p1/8/n1B1R3/q6b w - - 0 1)
Evans, TC
The Observer, 1933
(First published on Sun May 14 1933)
#2
7 + 9
| 15239 | Valois Notebooks | 2019 |
SOLUTION
- SOUND
- Sets
- 1...Qb2
- 2.Qxh1#
- 1...Qxe5
- 2.Qxe5#
- 1...Be4+
- 2.Bxe4#
- 1...Be1
- 2.Qxh1#
- 1...Sc1
- 2.Qxh1#
- 1...Sc3
- 2.Rd2#
- 1...c3
- 2.Bb3#
- 1...Qb2
- Tries
- 1.Bxa1+?
- 1...e5
- 2.Qxe5#
- 1...Kd6!
- 1...e5
- 1.Bb2+?
- 1...e5
- 2.Qxe5#
- 1...Kd6!
- 1...e5
- 1.Bh2+?
- 1...Kd4
- 2.Qe5#
- 1...Qe5
- 2.Qxe5#
- 1...e5!
- 1...Kd4
- 1.Bc3+?
- 1...e5
- 2.Qxe5#
- 1...Kd6!
- 1...e5
- 1.Bg3+?
- 1...Kd4
- 2.Qe5#
- 1...Qe5
- 2.Qxe5#
- 1...e5!
- 1...Kd4
- 1.Bd4+?
- 1...Kxd4
- 2.Qe5#
- 1...e5
- 2.Qxe5#
- 1...Kd6!
- 1...Kxd4
- 1.Bf4+?
- 1...Kd4
- 2.Qe5#
- 1...Qe5
- 2.Qxe5#
- 1...e5!
- 1...Kd4
- 1.Bc7+?
- 1...Kd4
- 2.Qe5#
- 1...Qe5
- 2.Qxe5#
- 1...e5!
- 1...Kd4
- 1.Bb8+?
- 1...Kd4
- 2.Qe5#
- 1...Qe5
- 2.Qxe5#
- 1...e5!
- 1...Kd4
- 1.Rd2+?
- 1...Qd4
- 2.Rxd4#
- 2.Qxh1#
- 1...Bxd2!
- 1...Qd4
- 1.Bxa1+?
- Keys
- 1.Qh8!
- threat
- 2.Qa8#
- 1...Be4+
- 2.Bxe4#
- 1...Qxe5
- 2.Qxe5#
- 1...c3
- 2.Bb3#
- 1...Sc1
- 2.Qxh1#
- 1...Sc3
- 2.Rd2#
- threat
- 1.Qh8!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 0
- REMOVED MATES = 2
- Sets
- Q(a);N_GUARD::QAB(E),XB(b)
- Q(a);OGATE,P_SPINQ(a),XB(D)::QAR1(E),XQ(a)
- B(b);CHECK,N_GUARD::B(A),XB(b)
- B(d);S_CUTQ(a)::QAB(E),XB(b)
- S(c);S_CUTQ(a)::QAB(E),XB(b)
- S(c);S_CUTB(d),S_CUTQ(a)::R(B)
- P(e);OGATEB::B(A)
- Tries
- Try
- B(D);CHECK,XQ(a)
- Vars
- P(h);P_SPINP(h)::QAR1(E),XP(h)
- Refutation
- K(g);P-FLIGHT
- Try
- B(D);CHECK
- Vars
- P(h);P_SPINP(h)::QAR1(E),XP(h)
- Refutation
- K(g);P-FLIGHT
- Try
- B(D);CHECK
- Vars
- K(g);P-FLIGHT::QAB1(E)
- Q(a);N_GUARD,P_SPINQ(a)::QAR1(E),XQ(a)
- Refutation
- P(h);P_SPINP(h)
- Try
- B(D);CHECK
- Vars
- P(h);P_SPINP(h)::QAR1(E),XP(h)
- Refutation
- K(g);P-FLIGHT
- Try
- B(D);CHECK
- Vars
- K(g);P-FLIGHT::QAB1(E)
- Q(a);N_GUARD,P_SPINQ(a)::QAR1(E),XQ(a)
- Refutation
- P(h);P_SPINP(h)
- Try
- B(D);CHECK
- Vars
- K(g);P-FLIGHT,XB(D)::QAB1(E)
- P(h);P_SPINP(h)::QAR1(E),XP(h)
- Refutation
- K(g);P-FLIGHT
- Try
- B(D);CHECK
- Vars
- K(g);P-FLIGHT::QAB1(E)
- Q(a);N_GUARD,P_SPINQ(a)::QAR1(E),XQ(a)
- Refutation
- P(h);P_SPINP(h)
- Try
- B(D);CHECK
- Vars
- K(g);P-FLIGHT::QAB1(E)
- Q(a);N_GUARD,P_SPINQ(a)::QAR1(E),XQ(a)
- Refutation
- P(h);P_SPINP(h)
- Try
- B(D);CHECK
- Vars
- K(g);P-FLIGHT::QAB1(E)
- Q(a);N_GUARD,P_SPINQ(a)::QAR1(E),XQ(a)
- Refutation
- P(h);P_SPINP(h)
- Try
- R(B);CHECK
- Refutation
- B(d);XR(B)
- Try
- Actual
- Q(E);
- Threat
- QAB(E)
- Vars
- B(b);CHECK,N_GUARD::B(A),XB(b)
- Q(a);OGATE,XB(D)::QAR1(E),XQ(a)
- P(e);OGATEB::B(A)
- S(c);S_CUTQ(a)::QAB(E),XB(b)
- S(c);S_CUTB(d),S_CUTQ(a)::R(B)
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